Podcast
Questions and Answers
In demand paging, when is a page brought into memory?
In demand paging, when is a page brought into memory?
- At load time
- When the process starts
- When the system boots up
- When the page is needed (correct)
What is the purpose of the valid-invalid bit associated with each page table entry?
What is the purpose of the valid-invalid bit associated with each page table entry?
- To indicate if the page is memory resident (correct)
- To indicate if the page is write-protected
- To indicate if the page is swappable
- To specify the page size
What is the role of a pager in demand paging?
What is the role of a pager in demand paging?
- To guess which pages will be used before swapping out
- To bring in only those pages into memory that are needed (correct)
- To allocate physical memory to pages
- To manage the address space of a process
What happens if the valid-invalid bit in a page table entry is 'i' during MMU address translation?
What happens if the valid-invalid bit in a page table entry is 'i' during MMU address translation?
How does demand paging enable sparse address spaces with holes left for growth?
How does demand paging enable sparse address spaces with holes left for growth?
What is the main benefit of virtual memory?
What is the main benefit of virtual memory?
What does virtual memory allow in terms of address spaces?
What does virtual memory allow in terms of address spaces?
How is the virtual address space usually organized?
How is the virtual address space usually organized?
Which method can be used to implement virtual memory?
Which method can be used to implement virtual memory?
What is the primary reason for using virtual memory?
What is the primary reason for using virtual memory?
What is the main advantage of organizing the logical address space for stack to start at the max logical address and grow 'down' while the heap grows 'up'?
What is the main advantage of organizing the logical address space for stack to start at the max logical address and grow 'down' while the heap grows 'up'?
What is the primary benefit of demand paging compared to bringing the entire process into memory at load time?
What is the primary benefit of demand paging compared to bringing the entire process into memory at load time?
What functionality does the pager implement in demand paging?
What functionality does the pager implement in demand paging?
What is the purpose of the valid-invalid bit associated with each page table entry?
What is the purpose of the valid-invalid bit associated with each page table entry?
What does the valid–invalid bit being set to 'i' on all page table entries indicate?
What does the valid–invalid bit being set to 'i' on all page table entries indicate?
What enables sparse address spaces with holes left for growth and sharing of system libraries in virtual-memory systems?
What enables sparse address spaces with holes left for growth and sharing of system libraries in virtual-memory systems?
What does a lazy swapper do in demand paging?
What does a lazy swapper do in demand paging?
What new MMU functionality is needed to implement demand paging effectively?
What new MMU functionality is needed to implement demand paging effectively?
When are pages treated no differently from non-demand-paging systems during MMU address translation?
When are pages treated no differently from non-demand-paging systems during MMU address translation?
How does demand paging handle a scenario where a page needed is not in memory?
How does demand paging handle a scenario where a page needed is not in memory?
What is the primary benefit of using virtual memory?
What is the primary benefit of using virtual memory?
What does virtual memory enable in terms of address spaces?
What does virtual memory enable in terms of address spaces?
How is the virtual address space usually organized?
How is the virtual address space usually organized?
What is the role of a pager in demand paging?
What is the role of a pager in demand paging?
What happens if the valid-invalid bit in a page table entry is 'i' during MMU address translation?
What happens if the valid-invalid bit in a page table entry is 'i' during MMU address translation?
In demand paging, when is a page brought into memory?
In demand paging, when is a page brought into memory?
How does demand paging enable sparse address spaces with holes left for growth?
How does demand paging enable sparse address spaces with holes left for growth?
